Bag-bottoming machine



Feb. 17, 1931. A. c. COTY ET AL 1,792,678

BAG BOTTOMING MACHINE Filed Aug. 30, 1929 4 Sheets-Sheet 1 I V NT RNA 4WATiRNEiS.

Feb. 17, 1931. A. c. coTY ET AL BAG BOTTOMING MACHINE Filed Aug. 50,1929 4 Sheets-Sheet 2 III.

4, v a INE/AE TOR. By 6M0 W m afiomvm s Feb. 17, A Q COTY ET AL BAGBOTTOMING MACHINE 4 Sheets-Sheet 3 Filed Aug. 30, 1929 INVENTOR E M .fll mg 1 ATTORNEYS.

Feb. 17, 1931. Q CO'TY ET AL 1,792,678

BAG BOTTOMING MACHINE Filed Aug. 30, 1929 4 Sheets-Sheet 4 INVENT R 4aBYQQMQM M W q,

WJEYS.

Patented Feb. 17, 1931 UNITED STATES PATENT OFFICE. Y

ALFRED CLEMENT GOTY AND THOMAS EARL COTY, OF WATER'I'OW'N, NEW YORKBAe-Bo'r'roirmG MACHINE Application filed August 30, 1929. Serial 1T0.389,401.

Our present invention relates to bag bottoming machines, by which wemean devices for folding and pasting the ends of b-lanks cut off from acontinuous paper tube. The pres 5 cut embodiment of the invention dealswith lengths cut off a previously-prepared tube, which are stored in amagazine adjacent to the machine prior to the action of the apparatusillustrated in this case.

The machine which we have devised is especially adapted to forming in asingle operation so-called valve bags, in which one end of the bag issealed and the other only partially so, and is particularly adapted formak: ing these of the heavy paper required for-cement or other materialsof considerable Weight and bulk, though not restricted in that respect.In these v bags one end is closely sealed after being formed and folded,and the other end is sealed in part only, leavin an opening by which thebag may be filled. This opening is afterwards closed in filling the bag.Generally speaking, these bags have been heretofore formed in separatemachines,

one for each end; one end being closed, and

the bag then transferred to another machine Our present invention,therefore, embodies preferably the tandem location .of mechanism forforming each end of the bag in the way indicateihand an interveningmechanism between the apparatus closing one end of the bag an d that forforming the other end, which receives the bags from the first machineand reverses them so that the open end is presented to the action of thesecond machine. This involves as we believe a new method of operation,greatly accelerating the speed and increasing the output to an extentwhich has not heretofore been attained. point out in the claims definingour invention, it embraces mechanical combinations necessary for formingboth the sealed bottom and the valve end of the bag in a single unitarystructure, all the parts of which are so timed and related asto co-o)erate in forming the completed product. 0 far. as we are advised, thiscombination of mechanisms is new.

The accompanying drawings show an embodiment of our invention. Figure 1is a 59 side elevation, partly broken away as to the Also, as we secondone of the bag-forming mechanisms,

and showing the gearing of the apparatus of the whole organization.Figure 2 is a side elevation upon a larger scale of the apparatus shownin the east end of Figure 1, with the gears removed so as to show thebag-bottom ing mechanism, and the magazine with its feeder. F i ure 2ais a view of one end of the bag tube, s owing-the application of pastethereon. Figure 3 is a representation similar 0 to Figure 2 of the westend of the arts shown in Figure 1, showing also partlcularly thereversing device or cylinder by the movement of which the bag is turnedover to present its unfinished end to the second mechanism. 65 Fl%l lle4 gives a plan view of the parts shown in igure 3. Figure 5 is adetailed section upon theline 5-5 of Figure 2 of the creaser cylinder.Figure 6 is a section on the line 66 of Figure 3 of the reversingcylinder. 79

Figures 3a, 3b, 3c, are sketches of the be in yarious stages ofcompletion; and Figure is asketch ofthe bag complete. Figure 1 shows atA the frame of the machine, which, as illustrated is cast in variousunits of different sizes and shapes, which are fitted together to makethe complete machine,

and secured in any desired way, as by dowelpins to secure precisepositioning, and bolts 'or other fastening devices, which are not 80shown but are well known-to machinists. We have not deemed it necessaryto describe all the different parts of the frame as they aresufiiciently indicated in the drawing, and may be indefinitely varied. Bis the magazine containing the cut-off blanks B B is the feeding devicefor the blanks, which is illustrated in other Figures, but theconstruction of which is fully detailed in our Patent No. 1,668,761, bagfeeding machine, datedMay 8, 1928, and which it is therefore unnecessaryto describe in detail. The parts indicated generically by the referenceletter C are for forming the bottom of the bag, as shown, for example,in Figure 3a, and hereafter more fully described. D indicates a cylinderfor the creaser knives; E is a paste mechanism; F

is the bottoming cylinder, which in some of its broader aspects isclaimed in our Letters- Patent No. 1,7 42,17 4, dated December 31, 1929,A

Serial Number 723,031, paper bag machine, filed June 28, 1924, and isdescribed in detail and claimed in our pending application, 278,- 459,bag machine, filed May 17, 1928, and which will be briefly described inconnection with Figure 2. G indicates the reversing cylinder, moreparticularly described in connection with Figure 3. At this point theposition of the bag is reversed, and it is started through a secondorganization of instrumentalities, being turned over from the positionshown in Figure 3a to that shown in Figure 3b.

The whole group of instrumentalities effecting this bears the referenceletter Gr with various exponents. H is the co-operating cylinder for thecreaser blades of the second apparatus. I is the bottom-formingmechanism of the second apparatus; K is the pasting mechanism, similarin its general character to the one marked E, differing slightly in theform of the shoe or pad which prints the paste at E upon the bag, asshown in Figure 30. After the application of the paste. and the foldingover of the flaps, the bag is in the shape shown in'Figure 7, and passesout of the machine, beingremoved by any convenient conveying device, notillustrated.

Figure 2 shows an organization for forming the bottom of the bag, whichis substantially like that shown in our application, Serial Number278,459, already referred to. Here B represents the bag-feeding device,shown in our Letters-Patent referred to, which selects out the bottombag from the pile shown at B1, and passes it into the machine.

This device consists of the feeding blades 6, 5 which oscillate and pickoff the bottom one of the bag blanks, which is then turned into themachine by means of a revolving segment 6 and a hook-shaped member B3,the feeding roll B co-operating with these to pass the end of the bag,having the thumb tag, as is usual, to the feed-rollers, C, C The bagthen passes on to roll C where the upper flap is engaged by the pin 0and the lower flap by the hook 0 upon the roll C This hook is operatedby the stationary cam C and holds the lower flap of the bag until it isbrought around to be engaged by the roll C.

In the meantime the link C operates a finger C by means of a crank-arm Cso that the finger holds open the flap which has been pulled open bymeans of the pin 0 the crankarm C is operated by the link C by means ofthe cam-roller 0 operated by the rotary cam C so that the motion of thefinger C is regulated to hold open the upper side of the bag, while thefinger 0 moves down at such a rate as not to tear the bag, while stillholding it open; when the roll C engages the bag, the finger ispractically in alinement with the opening between the rolls C, C, andthe bag easily slides off it, after which the finger C is returned toits illustrated position. All this is fully described in ourapplication, S. No. 278,459, referred to and need not be detailedfurther. The bag continues its course between the feed-rolls 0 C, untilit is engaged by the cylinder D and the belts or tapes L, L These tapesare-in pairs on opposite ends of the cylinder as indicated in Figure 4.The construction of this cylinder D, as indicated also in Figure 5, isidentical with that of the cylinder H in the apparatus for forming thesecond closure of the bag. In general, it consists of the cylinder D andthe cross-arm D these being secured together by adjusting devices (1,which permit the adj ustment of the pads or slot-carrying parts D uponthe ends of the arm D with reference to the creaser-blades and the otherslot bars D D The purpose of this adjustment is to enable these pads tore ister with the knives K K consisting 0 arms carrying creaser-bladesfor forming and turning up the flaps, which are to be folded by thecylinder F.

A second one of these knives or creaserblades K registers with theslot-carrying bar D carried by the cylinder D; after the flaps arecreased in this way, the bag passes on and is engaged by the belts L, LThe belt L is kept taut by a belt-tightener L of common form, and belt Lis similarly tightened by such a device marked L at the top of Figure 2.Of course these belts or tapes are run upon suitable guide-rollers, asis well understood.

While passing the cylinder D, paste is printed on the closure of thebag, as shown at e Figure 2a, by means of the pad 6 carried upon theroll E of the paste-printing mechanism E. The pad (2 takes paste from afeeding roller E which is carried upon a springoperated arm E andrevolves in the pastetank E As will be observed the shape of thispaste-pad is such as to make a complete closure of the bag 13 when theflaps are folded over.

Passing on from the cylinder D and the creaser-blades K K between thebelts L, L the bag engages with the folding cylinder F, which carriestwo sets of folding blades F F and F F so that two bags may be operatedupon at the same time by the single cylinder. A bag is, shown'with theflaps b b projecting between the disks, which constitute this cylinder,so called for convenience. the construction being particularly describedin our application 278,459, already referred to.

The blade F presses down upon the flap b by a movement which first foldsover the flap, and then presses it down and holds it in place until theflap b is similarly folded over and held down by the blade F the timingbeing such that the blade F is Withdrawn just as the second flap isfolded over. These blades are controlled in their action by the meagrestationary cams F, F, and are operated by cam-rollers running upon theedges of these cams, and also by others in grooves 7' 7' in theircam-faces. The positions of the cams are maintained by bars F, only oneof which is shown,-and there is the usual adjusting device F Afterleaving the cylinder F the bag passes on between the tapes 14L, and therollers with that for forming the valve end. Figure 3 should be read inconnection with Figure 4.

The cyhnder G is 1n reality composed of.

v two disks spaced apart on a central shaft the illustrated position.

and which are tied together by crossbar-s 9 against which thecrank-levers G G clamp the bag and it is also provided witha stationarycam G having an adjusting device G so that the timing of the arms G G",may be regulated. Crossbars G G support over the cylindercylindrically-formed strips of metal which act to guide the bag. G is afeed roller or disk, working in conjunction with the mutilated'roll G".This roll has two diameters in its diiferent parts, one, 9 being cutaway, and the other, 9*, registering with the roll G. I

A roll G is also provided having a fixed cam g the bell-crank lever g,and the outer end of the bell-crank is formed with a hook, the action ofwhich is presently to be described. A feed-roller g co-operates the rollG; and a roll G havingtwo difierent diameters at diflerent parts of thecircumference, as illustrated, acts as a feed for the bag.

The operation of the parts is as follows When the bag leaves the beltsL, L in the upper right-hand side of Figure 3, and passes down betweenthe rollers Gr and G, it is engaged by one of the hooks or bell-cranklevers G, and carried with the revolution of the roll between the rollsor disks G, G, the cut-away portion G of the roll G being then adjacentto the roll G. The bag continues in this clock-wise direction until justas the end of it is about to pass between the rolls G, G, at which timethe bell-crank lever, which holds it at the front end, is released bythe cam projection 9 By this time the larger diameter of the roll G at ghas reached the roll G, and engages the surface of the bag, the ositionof which is thus reversed as it is reed from the bell-crank, in Itshould also be stated that the bell-crank levers are operated b theprojection g on the cam G, so that tii ey are lifted just at the timewhen the bags engage with them in succession, and immediately runnin oilthe projection g? clam the ends of the ags tightly against the r01 G.

By this time the hook g has rotated until it is directly opposite theend of the bag as the rolls G G project the bag into the hook. This hookdoes not engage with any other parts of the machine, but is adjustedrelative to 1ts engagement between the roll G and the roll. C.

As soon as the bag has been pressed against the hook g so as to locatethe end of it definitely with reference to the succeeding operations,the cam-roller g is operated by the high part of the cam g, and the hookis re moved from the end of the bag, permitting it to pass freely to theroll G, the larger di-v ameter of which then engages with the roll C atthe definite point indicated by the designer. The entry of the bag tothe rolls G and g is thus timed correctly, after which cam-roller grides off the high spot of the cam, retiring the hook g.

The roll C and its co-operating parts are precisely like the rolls C C.shown in the east end of the machine in Figure 2. The finger C issimilarly operated, as is also the hook, and the bag passes onafterhaving its end opened, between the rolls C C C C, and engages withthe belt L and the creaser pad-roll H, which is also like the roll D ofFigure 2. A paste-pad is shown at k on the roll K for applying paste;but this pad, as indicated at 6? Figure 3, is so designed as to printpasteupon only two sides of the opening, the efiect being to leave thepart of the bag marked 6 unsecured so that the bag maybe filled, afterwhich its flap is blown shut as the bag is filled.

In Figures 3 and 4 appears a'guide rod G one being on each side of thepath of the bag; these act to straighten the bag at the time thegrippers G, G let go and rolls G. G take hold.

of the roll H, which is like the roll I) of Figure 2, and of thecross-bar with its pad- H while the rim of the roll is marked H and theadjusting boltsare marked H".

In Figure 6 I have shown a cross-section of the reversing roll G; thereference characters being the same as shown in Figure 3, furtherdescription of this figure seems to be unnecessary. Similarly a detaileddescription of Figure 4, the reference characters of which are the sameas those of Figure 3, seems unnecessary; a

1 The operation of the various gears co-ordinates the movements of theparts of the machines, a belt 1 driving a pulley from which all thegears take their motion and a longitudinal shaft 2 transmitting motionderived from a bevel-wheel on the main pulley-shaft to a similar Wheelon one of the gear-shafts of the second part of the apparatus, wh ch!forms the valveend of the bag. These bevel; are cut away in Figure 1 toshow the spurtin gears on the same shafts, but one set of them is shownat the left in Figure 4.

Many obvious changes may be made in the arrangements without departingfrom our invention.

While we have spoken herein of reversing the movement of the bag, and ina sense this is true, what happens is the reversal of the position ofthe bag relative to its movement through the machine; since obviously itproceeds from one end to the other of the apparatus insubstantiallyuninterrupted progress.

We believe ourselves to be the first to provide a fully automaticapparatus which closes one end of a bag and then by a substantiallycontinuous mechanical process forms the other end alsd, closing it tothe desired extent and discharging the completed bag from the machine.'VVe also believe ourselves to be the first to do this by bottoming thebag and then turning the bag end for end so that its open end ispresented to the second bottom er, such reversal being effected by meansmaintaining positive mechanical engagement between the reversingmechanism and the blank during the passage, so that the blank is neverfree from control, and does not interfere with the others of the series;it is to be understood that we do not, by describing in this case amagazine of previously prepared blanks, limit our invention to thatconstruction.

What is claimed as new herein is 1. In machines for making bags, amagazine for tubular blanks, bottoming mechanism for closing one end ofeach blank in succession, feeding mechanism for passing the blankssuccessively from the magazme to the bottoming mechanism, bottomingmechanism for closing to a desired extent the other end of each blank insuccession, and means intermediate of the two bottoming mechanisms forreversing the positions of the blanks successively with reference to thedirection of motion through the apparatus; such means automaticallymaintaining positive engagement with each blank from its release by thefirst bottoming mechanism until it is engaged by the second.

2. In machines for making bags, means for feeding tubular blanks, meansfor closing one end of each blank, means for reversing the position ofthe blanks, such means positively engaging the blank during the entirereversal, means for feeding the blanks in reversed position, and meansfor closing the other ends of the blanks to a desired extent; the saidseveral means being co-ordinated to act automatically upon a successionof blanks, as described.

3. Reversing mechanism in a bag-making machine comprising a cylinder,grippers carried thereby holding a bag-blank against the cylinder fortravel in one direction, means for causing the bag to move in thereverse direction, and means for releasing the grippers when thelast-named means acts, as described; whereby the bag-blank is turned endfor end while continuing its progress through the machine, and is at alltimes positively engaged.

4. Reversing mechanism in a bag-making machine, comprisin a cylinder, agripper for holding a bag-blan against the cylinder, a

cam for releasing the gripper and a spring A for holding it closed, anda pair of gripping rolls for moving the bag in the opposite sense; thewhole so timed that the gripper is released by the cam at the time thegripping rolls engage the bag blanks whereby the blank is turned end forend relativ'e to its progress through the machine.

5. In amachine for making bags, and in combination, means for feedingtubular blanks, bottoming mechanism closing one end of, each of theblanks in succession, a reversing device for the blanks by which theyare successively turned end for end with reference to their progressthrough the machine, the device comprising a cylinder revolving around afixed cam upon a horizontal axis, grippers operated by the cam andholding the bag-blanks successively upon the cylinder, gripping rollsfor engaging the open ends of the blanks at desired times, thecam-surface being formed to open the grip pers to receive the blanks andto open them a second time to release the blanks when the latter areengaged by the gripping rolls, and bottoming mechanism for closing theopen ends of the blanks to a desired extent.

6. As a unitary mechanism for making bags, a bag-bottoming apparatus forforming and closing one end of a tube forming a bag-blank, a secondapparatus for forming and for closing to a desired extent the other endof the tube constituting the blank. and positive automatic mechanism forreceiving the blank from the first apparatus and pre senting it to thesecond in co-ordinated relation for such forming and closing; suchmechanism positively engaging the bag-blank during the time of transferfrom one bottoming apparatus to the other.

7 In a bag machine, means for closing one end of a bag-blank; means forclosing to a desired extent the other end of the bag-blank; and positiveautomatic means in continuous engagement with the blank for transferringit from the first named means to the second and turning it end for endwhile so doing.

8. As a reversing mechanism for a bagblank in a paper-bag bottomer, a,-cylinder, gripping fingers for receiving an end of the bag-blank, meansfor engaging the bag separate from the fingers and operative to reversethe movement of the bag, and means for releasing the fingers at the timethe reversing means acts; the whole so timed and acting that thebag-blank is under continuous mechanical control during the entirereversing operation.

9. As a reversing mechanism for a baglblank in a paper-bag bottomer, acylinder, gripping fingers for receiving an end of the bag-blank, meansfor engaging the bag separate from the fingers and Operative to reversethe movement of the bag, and cams and cam-rollers operating to releasethe fingers when the reversing means acts.

Signed at Watertown, in the county of J efferson and State of New Yorkthis 22nd day of August, A. D. 1929.

ALFRED CLEMENT COTY. THOMAS EARL COTY.

